Error 0x80070057: How to Solve

An error people often get when running Windows 7 is something called Error Code 0x80070057, sometimes accompanied by the phrase “the parameter is wrong”. This post will explain what that the issue is, where it comes from, and, most importantly, how to fix it.

What causes Error 0x80070057

Most of the times, this error occurs while trying to backup files in Windows 7.

It may also be caused while installing Windows 7. Other potential causes could be issues with the system reserved partition, or registry entries getting corrupted.

Error Code 0x80070057 while trying to backup files

As we’ve mentioned before, one way to get this error is while trying to backup files using the Windows default backup software.

How this usually works (or, rather, doesn’t work) is that the process starts and then at some point you get something like the following message: “An internet error has occurred: The parameter is incorrect: (0x80070057)”.

In order to solve this issue, follow this guide:

Solution #1: Modifying the registry manually


You should backup windows registry before you take the following steps below.

Since the issue can be traced back to problems with the registry, here is how to add a registry key value manually:

  1. Go to Start, then Search for the file called “Registry.exe”.
  2. After you’ve found the file, click this registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\System
  3. In the Edit menu, go to New, and click on DWORD Value.
  4. Type CopyFileBufferedSynchronousIo and then hit Enter.
  5. Right-click CopyFileBufferedSynchronousIo and then click Modify.
  6. Look for the Value data box, type 1, and then click OK.


Note that modifying registry keys isn’t something you’ll want to be doing on a regular basis. In fact, if you’re not comfortable with it, you probably shouldn’t do it at all.

Less tech-savvy users should probably use a registry cleaner.

Solution #2: Change the decimal symbol setting

control-panel Error 0x80070057

To do this, follow these steps:

  1. Go to Start -> Control Panel -> Date, Time, Language and regional Options -> Region and Language Options.
  2. Now click the Formats tab and then Additional settings.
  3. Go to the Decimal symbol field, where you have to type “.” (dot), and then click OK twice.
  4. Restart your computer.


Error Code 0x80070057 while trying to install Windows

The reason this error occurs in this particular case is due to an issue with the System Reserved Partition (which is about 100mb default partition for BitLocker encryption, Recovering Windows, and other System Files).

When it happens, you will have to delete the existing Windows partition where the previous version of Windows was installed (usually on Local Disk C:). This includes the System Partition. Then you will have to format the disk for a new, clean installation of Windows.

In order to accomplish all of that, follow the steps outlined below:

  1. Insert the Windows 7 DVD and begin the installation process.
  2. Select Custom (advanced) installation.
  3. Select Disk 0 partition 1, and then click Delete. By doing this, you’re deleting the System Reserved Space.
  4. When prompted, click OK.
  5. Now point select Disk 0 partition 2 and repeat the same process as with Disk 0 partition 1.
  6. At this point you will have some Unallocated Space, so select it and create a new partition. You should be really mindful while creating a new disk. Carefully consider the size of the new disk and then click Apply.
  7. As before, when a dialog box appears on screen hit OK.
  8. Select the Disk 0 partition 2 and format it once more.

Let us know if this guide was helpful to you when trying to solve this error. If you have other tips or ideas we haven’t covered, write them in the comments below!

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